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LifeIsADangerousGame

  • 2 years ago

Help with Slope?

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  1. Directrix
    • 2 years ago
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    Is there a problem to work?

  2. LifeIsADangerousGame
    • 2 years ago
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    Yea, here is it I already have my answer for it -3/4 is that correct?

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  3. electrokid
    • 2 years ago
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    m=(1-3)/(4-0)= -2/4= -1/2

  4. phi
    • 2 years ago
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    @electrokid Can you explain how you did that ?

  5. electrokid
    • 2 years ago
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    well, i took each grid as "1" unit m=(y2-y1)/(x2-x1) it is a st line so, should be same

  6. electrokid
    • 2 years ago
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    oh.. i took the y-intercept as "3" instead of "4".. got ya so, it is "-3/4"

  7. electrokid
    • 2 years ago
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    eyes are deceptive

  8. LifeIsADangerousGame
    • 2 years ago
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    @phi what does it mean to solve for y in terms of x? And how do I figure out the slope of a line with some like y=(-3/4)x-2?

  9. phi
    • 2 years ago
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    two questions if you are given y = mx +b form (in other words you see y = number times x plus another number the number in front of the x (the coefficient of the x term) is the slope (that is why people put the equation in this form, so they can "read off" the slope

  10. phi
    • 2 years ago
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    solve for y in terms of x that means do algebra so y is on the left side of the = and everything else is on the right side for example if you had 3x+4y= -8 that is the equation of a line. But it is not obvious what its slope is. if we solve for y, we would do this: add -3x to both sides 3x-3x + 4y= -3x -8 or 4y= -3x-8 (that step "moved" 3x to the right side) now divide both sides by 4 (both sides, all terms) 4y/4 = -3x/4 -8/4 y= (-3/4)x -2 we have solved for y in terms of x

  11. LifeIsADangerousGame
    • 2 years ago
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    So for something like 6x+3y=81 it would be 6x+3y=81 -6x -6x 3y/3 = - 6x/3 - 81/3 y = - 6x/3 - 81/3 y = -2x - 27?

  12. LifeIsADangerousGame
    • 2 years ago
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    actually, I messed it up, one moment

  13. LifeIsADangerousGame
    • 2 years ago
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    6x+3y=81 -6x -6x 3y/3 = - 6x/3 + 81/3 y = - 6x/3 + 81/3 y = -2x + 27? That should be correct

  14. phi
    • 2 years ago
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    yes, perfect. slope is -2 and y-intercept is 27

  15. LifeIsADangerousGame
    • 2 years ago
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    :D Awesome, I'm gonna go try it out a little

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